Smoke-consuming furnace



UN TED STATES V PATENT OFFICE.

cUSrAv A. EARTH, on ST. LOUIS, MISSOURI.

fs'MoKE-coNsU mc FURNACE.

SPECIFICATION forming part of Letters, Patent No. 260,824, dated July 11, 1882.

' Application filed January 30, 1882. (No model.)

To all whom it may concern:

Be it known that I, GUSTAV A. BARTH, a citizen of .the United States, residing atthe city of St. Louis,in the State of Missouri, have invented certain new and useful Improvements in Smoke-Consuming Furnaces, ofwhich the following is a specification.

This Invention relates to certain improvements in that elass of smoke-consumers for [O steam-boiler furnaces in which combined jets: of steam and air are discharged into the com-" bustion-chamber to assist combustion and this invention consists in an improved arrangement of parts, as will hereinafter morefully appear,

whereby the above object is attained in a very perfect and efficient manner.

In the drawings, Figure 1 is a transverse Section, illustrating my improvements as applied to a horizontal steannboiler furnace; and

220 Fig. 2 is a longitudinal section of the same.

Referring to the drawings, A represents the combustion-chamber of the furnace, the bridgewall B of which is arranged so as. to have a forwardly-overhanging portion, as shown, the

purpose ofthis construction being to retard the .backward passage ofthe products of combustion from the combustion-chamber before they have been intimately mixed with the air and steam supply and their combustion effected. I

Within'the combustion -chamber A is arranged a perforated distributing-pipe, G, ex tending around the four sides of the said chamber, and consisting of transverse pipes, one, a, at theforwardend ofthecombustion-chamber, and

3 5 the other, 0', immediately forward of the bridgewall, and longitudinal pipes 0 0 arranged at the sides of the combustion-chamber. These pipes are connected together in any suitable manner and communicate one with the other,

4.0 and their discharging perforations or orifices are arranged at dificrent angles from a hori zontal plane, so as to discharge the air and steam (used for promoting combustion) in all directions onto the fuel and into the products of combustion arising therefrom. By this means the heated air and steam are brought \into intimate and thorough contact with the products of combustion, so that the combustion of the gaseous combustible matter arising from the fuel will be effected in a very perfect manner within the combustion-chamber.

The air-supply for the discharge-pipes c 0,

&c.', is taken from underneath the fire-grate, as shown, through funnels D, at the rear and sides of the rear end, having their mouths protected by a covering of wire-gauze to prevent access of dirt, 850., to the interior of the pipes, and

"said air-supply is forced throu gh the dischargepipes c c, 830., by means of a steam-injector, E, at the rear and sides of the rear end of any suitable form and construction. The steam .used by such injector min gles with air-supply, and in their passage through the pipes c c, &c., they become highly heated, in which state they materially aid the combustion of the fuel and its gaseous products. One or more of-these injectors may be used in connection with my improved construction, as may be found necessary or convenient, and they have their supply of steam furnished from the boiler by suitable pipe-connection, F, the passage of steam through which is under control of the engineer by means of a stop-valve, f.

r In constructing my improved apparatus the discharge or distributing pipes c c, 860., may be of iron, fire-clay,or other suitable refractory material, and they maybe arranged partly embedded in the wall or wholly projecting, as desired. The forward distributing-pipe is arranged up adjacent to the bottom of the boiler, and a number of its perforations .discharge backwardly in a horizontal plane near the bottom of the boiler, so as to carry 0d the burned gaseous matter from the combustionchamber and assist the draft of the furnace.

While my improvementis shownin the draw in gs as applied to a horizontal steam-boiler furnace, still it is evident that it can be readily modified to suit other forms of furnaces without departing from the spiritrmy invention.

Having thus fully described my said invention, what I claim as my invention, and desire to secure by Letters Patent, is

. 1. In combination with a perforated pipe extending around the four sides of the furnace, the pipe I, injector E, and funnel-openings D, located at the rear of the furnace, substantially as and for the purpose set forth.

2. The pipe surroundingthe furnace and provided with perforations pointing in different directions, and so arranged that one set of the perforations point directly back over the bridgewall to increase the draft, as set forth.

3. The combination of steam-pipe F, injectorE, funnel D beneath the grate, vertical pipe 0, transverse rear pipe 0, transverse front pipe 0 above the combustion-chamber, side connecting-pipes, c 0 and bridge-wall B, as set forth, the pipes O c c c 0 having perforations for directing the combined steam and hot air from beneath the grate into the combustionchamber, as explained.

4. The combination of rear and side funnels, D,beneath the grate, at the rear end of the furnace, the rear and side vertical pipes, G, the rear and side injectors, E, and transverse and longitudinal perforated pipes c 0 c c beneath the boiler, as set forth.

5. The front transverse pipe, 0, having per- GUSTAV A. EARTH.

In presence of-- FRANK I. LOPEMAN, ROBERT BURNS. 

